First off, I don't think they should be called that, because thats a dumb name, but I'm not sure what else to call them, so that'll do.
My idea is that there should be another category of skills. As everyone knows, there are Elite skills, which are bordered in gold, and normal skills, that are not bordered. I think there should be a third branch of skills, with a silver border. In this branch should be the more powerful skills, but not as good as elite skills.
For example, the loved and hated Mystic Regeneration is a bit better than the standard skills (1/4 cast, 5 regen, huge regeneration) but not as good as some elites. There would be a limit on these "Silver Skills", I think no more than two or three would be good.
I don't think that ArenaNet should make a whole new branch of skills, but turn some of the existing skills into silver skills. This would prevent straight nerfs, but would nerf certain builds. I made up some new skill icons for some of the more powerful skills that I believe could use a limit.

Having this restriction would allow certain builds to continue to work, but would nerf the most annoying builds, such as the R/N Touch Ranger, or the E/D Earth Magic Elementalist.
Please tell me what you guys think !